MGNI Form 144: Affiliate proposes sale of 6,000 shares

Adam L. Soroca submitted a Form 144 notice reporting proposed sales of Common Stock, with a listed block of 6,000 shares and proceeds shown as $108,000.00.

Rhea-AI Filing Summary

Adam L. Soroca submitted a Form 144 notice reporting proposed sales of Common Stock, with a listed block of 6,000 shares and proceeds shown as $108,000.00. The filing also lists restricted shares vesting on 02/15/2023, 05/15/2026, and 05/25/2026 and multiple reported dispositions during the prior three months.

Insights

Compliance Officer

Form 144 notifies the market of an affiliate's intent to sell shares and documents recent dispositions.

The filing identifies 6,000 shares as a listed block with proceeds of $108,000.00 and records multiple sales in May–June 2026. These sales are disclosed to meet Section 144 notice requirements for affiliate transactions.

Review remaining holding and vesting schedules for reporting completeness; subsequent Form 4s or secondary filings may update amounts or final transactions.

Key Figures

Listed block: 6,000 shares Gross proceeds (listed): $108,000.00 Vesting — 02/15/2023: 1,083 shares +4 more

7 metrics

Listed block 6,000 shares Form 144 top-line block amount

Gross proceeds (listed) $108,000.00 Proceeds shown alongside the 6,000-share block

Vesting — 02/15/2023 1,083 shares Restricted Stock Vesting Under a Registered Plan, <date>02/15/2023</date>

Vesting — 05/15/2026 3,285 shares Restricted Stock Vesting Under a Registered Plan, <date>05/15/2026</date>

Vesting — 05/25/2026 1,632 shares Restricted Stock Vesting Under a Registered Plan, <date>05/25/2026</date>

Largest recent sale reported 42,756 shares Disposition on <date>05/28/2026</date> with proceeds listed

Notable recent sale 27,606 shares Disposition on <date>06/01/2026</date> with proceeds listed

Key Terms

Form 144, Restricted Stock Vesting Under a Registered Plan, Issuer

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Vesting Under a Registered Plan financial

"Restricted Stock Vesting Under a Registered Plan | Issuer"

Issuer regulatory

"Restricted Stock Vesting Under a Registered Plan | Issuer"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does MGNI's Form 144 filed by Adam L. Soroca mean?

It notifies the SEC of an affiliate's proposed sale of registered shares, reporting a block of 6,000 shares. The filing lists vesting events and multiple sales in May–June 2026, documenting compliance with resale notice requirements for affiliates.

How many shares and proceeds are listed on the Form 144 for MGNI?

The Form 144 lists a block of 6,000 shares with proceeds of $108,000.00. The filing also records several prior month sales with individual share counts and gross proceeds on specific dates.

Were any recent sales reported by Adam L. Soroca before this Form 144?

Yes. The filing records multiple dispositions in May–June 2026, including transactions of 42,756, 27,606, and other share amounts with listed gross proceeds for each sale over that period.

Does the Form 144 show how the shares were acquired or vested?

The filing lists several entries labeled 'Restricted Stock Vesting Under a Registered Plan' with vesting dates 02/15/2023, 05/15/2026, and 05/25/2026, indicating acquisition via vested restricted stock tied to service.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/16/2026 - 04:09 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001725125
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MAGNITE, INC.
SEC File Number	001-36384
Address of Issuer	1250 BROADWAY 9TH FLOOR NEW YORK NEW YORK 10001
Phone	212-243-2769
Name of Person for Whose Account the Securities are To Be Sold	ADAM L SOROCA
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Former Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	6000	108000.00	143215003	06/16/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/15/2023	Restricted Stock Vesting Under a Registered Plan	Issuer			1083	02/15/2023	Services Rendered
Common	05/15/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			3285	05/15/2026	Services Rendered
Common	05/25/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			1632	05/25/2026	Services Rendered

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/15/2026	6000	102000.00
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/11/2026	6500	104195.00
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/09/2026	6900	105225.00
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/03/2026	7100	100975.49
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	06/01/2026	27606	418014.69
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	05/28/2026	42756	603084.95
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	05/27/2026	18225	250477.11
ADAM L SOROCA 1250 Broadway, 9th Floor New York, NY 10001	Common	05/18/2026	18451	247975.90

144: Remarks and Signature

Remarks
Date of Notice	06/16/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Adam Lee Soroca, Trustee
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)